Public bug reported:
I/O performance seems OK for loopback mount during xen-create-image,
however predictably the system hangs (intermittently but half a dozen
times today). When I do this by hand it seems that heavy I/O such as dd
triggers it:
# dd if=/dev/zero of=feisty_base_swap.img bs=1024k count=1000
Segmentation fault
[EMAIL PROTECTED]:/srv/xen/domains/vm2.mlerp.com#
After that several possible symptoms: a simple "ls" may hang
indefinitely or else trying to umount the loopback mounted image in /tmp
hangs or everything freezes up. Whatever, the server anwers to pings but
no ssh progress after the initial TCP connect()
I had read about the unstable loopback under heavy I/O but that it seems this
bad :-(
Was there not an announcement quite a long time ago that Xen will support
"Meta" information in disk image files such as VMware?
Regards,
Anton
** Affects: xen-3.1 (Ubuntu)
Importance: Undecided
Status: New
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Hanging xen-create-image likely related to loopback mount
https://bugs.launchpad.net/bugs/161878
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